Battery pack assembly including apparatus for detecting water accumulation and method for detecting water accumulation

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery pack assembly and a method for detecting a hair grip. For this purpose, an embodiment of the present invention includes a watertight case in which the watertightness sensing device is installed on the bottom surface and the battery pack is assembled therein, and the watertightness sensing device includes water A body having a water inflow hole formed therein; A floating member floating by buoyancy of water introduced into the body; A switch unit electrically connected to the floating member when the floating member rises to a predetermined height; And an elastic member connecting the floating member and the bottom surface of the body such that the floating member is in a predetermined position when buoyancy of water does not act on the floating member.